The indexOf() method starts at a specified index and searches from left to right (from the given start postion to the end of the array). By default the search starts at the first element and ends …

var index = Data.findIndex(item => item.name == "John") Which is a simplified version of: var index = Data.findIndex(function(item){ return item.name == "John"}) From mozilla.org: The …

Dec 21, 2019 · shift can be used in places where you want to get the first element (index=0) of an array and chain with other array methods. example: const comps = [{}, {}, {}] const specComp …

Dec 29, 2011 · How can I simply and directly find the index within an array of objects meeting some condition? For example, given this input: var hello = { hello: 'world', foo: 'bar'}; var qaz = { …

Mar 13, 2025 · The indexOf() method of Array instances returns the first index at which a given element can be found in the array, or -1 if it is not present. Element to locate in the array. Zero …

Array.indexOf() returns -1 if the item is not found. If the item is present more than once, it returns the position of the first occurrence. Array.lastIndexOf() is the same as Array.indexOf(), but …

Mar 14, 2024 · In JavaScript, indexOf() methods provide the first index at which the given element exists, and -1 in case it is not present in the array. Syntax: indexOf(element)

Sep 27, 2024 · The JavaScript Array at() method takes an integer value (index) as a parameter and returns the element of that index. It allows positive and negative integers. For the negative …

Nov 18, 2024 · indexOf () returns the first index of a specified value in an array, or -1 if the value is not found. findIndex () is used for finding the index of an element based on complex …

Sep 8, 2011 · The findIndex() method returns the index of the first element in the array that satisfies the provided testing function. Otherwise -1 is returned. var fooArray = [5, 10, 15, 20, …